Hi Scotty,
The current version of SAM only models two electricity metering scenarios as described in this diagram:
The next version, which we plan to release in late January 2016, offers more metering options, including one that should meet your requirements.
Would you mind telling us the specific rate structure you are modeling? Is it for an American electricity service area?
Best regards,
Paul.
p.s. Sorry for the lack of HTML tag support in the forum editor -- it should allow you to use HTML in your posts, but for some reason is not working properly.